Screw-press.



Patented Mar. 4,1902.

L. M; uossA. SCREW PRESS. (Applioatiqn filed Sept, 23, 19,01.)

(No Model.)

In men toz".

TAfitzzelsses.

THE NORRIS PEFEHS coJmoroun-wo" wsnmofon, u, c,

llwrrno STATES PATENT 'Grrrcn.

LEWIS M. IIOSEA, OF CINCINNATI,

SCREW-PRESS.

SPECIFICATION forming part of Letters Patent No. 694,861, dated March 4,1902. Application filed September 23, 1901. Serial No. 76,276- (Nomodel.)

To aZZ whom it may concern.-

Be it known that I, LEWIS M. HOSEA, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented new and useful Improvements in Screw-Presses,of which thefollowing is a specification.

My invention relates to screw-presses, and is applicable particularly tothose used in prizing tobacco and for other purposes, its object beingto improve the same both in construction and mode of operation with aview to increased efficiency and capacity and facility of manipulation.The presses of this character as heretofore generally constructed andused consist of a relatively long screw hung in a nut secured to thehead-block and operated by rotating either the screw or nut byoscillating ratchet devices. Besides increased cost of construction thegreat length and necessarily-enlarged diameter give the screw greatweight and consequent friction in the supporting-nut, which makes theelevation of the screw for readjustment a tedious and laborious process,especially in those presses in which the ratchet devices, carried on thescrew itself, add considerably to the weight and friction. Where, as inthe case of large screws used in tobacco-packing warehouses, the screwmust be lifted several feet for readjustment by the same ratchet devicesused in compressing, much valuabletimeis wasted, besides the labor. Inmy improvement the readjustment of the screw is effected with littlelabor and no loss of time and all its op erations facilitated; to whichend it consists in a screw carried telescopically in and protrudingbelow a tubular casing, which casing is longitudinally adjustable in theheadblock. In the preferred construction shown herein the casing andscrew do not rotate, the protrusion of the screw being effected by aratchet-nut upon the screw, which nut, together with its operatingdevices, is swiveled to and in contact with the lower end of the tube,whereby also the screw is supported mediately by the tube. The nuttherefore operates as a rotating wedge, forcing the screw in eitherdirection in relation to the tube as an adjustable abutment. The screwis therefore relatively short, light, and its readjustment in the tubemay be easily and quickly accomplished by rotating the platen as a handWheel, while the entire device (screw and easing) can be lifted ordepressed at any time instantly and directly.

Furtherdetails willappear in tho subjoined description, the essentialfeature of the invention being the adjustable tubular casing carryingthe screw and operating as a shifting abutment against which theoperatingthreads of the screw act.

Mechanism embodying my invention is illustrated in the accompanyingdrawings, in which- Figures 1 and 2 are side elevations, the latter inaxial section, of my improved screwpress; Fig. 3, an under plan of thehead-block, showing the clam ping-rin g and its immediate attachments;Fig. 4, a vertical cross-section through the head-block, showing across-elevation of the clamping-ring and operating devices. v

Referring now to the drawings, A designates the head-block orcross-beam, constituting the supporting element. of the screw E, and itsattachments. It may be in duplicate, as shown, and constitute part of asuitable press-frame, or, as common in large screws used intobacco-packing warehouses, a crossbeam of the building where used.

At the upper and lower sides of the beam or beams A are metalguide-plates a a perforated to receive and guide a metal tube 0,arranged to be adjusted vertically in and through the guide-plates andheld against ro tation by a spline 0, attached longitudinally at theouter side of the tube, engaging in a corresponding side recess in eachguide-plate opening into the central perforation. The tube 0 is held inadjusted positions in any convenient manner. I prefer and have shownherein a two-part ring D,of metal, hinged at the rear side by a pintle dand arranged to embrace the tube 0, the front terminals d 07, of thering being turned outward andperforated tangentially for the receptionof a screwshaft d threaded into one of said terminals and held to theother by collars d d. The outer terminal of the screw-shaft d is fittedwith a wheel or crank w, by which the twopart ring is operated to clampthe tube 0 and retain it against upward movement by contact of the ringD against the plate a of the head-block and against downward movement bysimilar contact against supporting-cleats 03, attached to said plate andprojecting beneath the ring. The tube may be elevated, depressed, andcounterbalanced by arope y and weighty (shown in dotted lines in Fig. 1)when the clamping-ring D is released. The tube 0 is utilized as thecarrier and guide of the compression-screw E, which operatestelescopically within the tube and projects downwardly through the same,carrying the usual platen e at its lower end. The screw E is held to andsupported by the tube 0 by means of a nut F, fitted in an oscillatingpawl-frame G, which latter is swiveled to a circular flange c at thelower mouth of the tube by a conutersunk collar g, secured to the frameG and engaging over the flange c, the oscillating frame projectingradially in opposite arms g formed as sockets to receive ordinarycapstan-bars z for operating the nut F, as follows: The outer face ofthe nut F is re cessed to receive and be engaged by the terminals of apawl or pawls p, pivoted in the frame G, the pawl or pawls beingreversible and held in ultimate positions of engagement by springs inthe usual manner of such constructions.

The mode of operation is as follows: The screw E being slightlyprotruded th rough the tube C is held and guided in the extended axis ofthe tube by the telescopic fit of the inner cylindrical wall of the tubeagainst the outer threads of the screw, these parts being soproportioned in length that a sufficient lap shall always exist in thepressing operations. The clamping-ring D being loosed, the tube 0 isdropped down through its guide-plates a a until the platen e rests uponthe mass to be compressed. The ringD is then clamped to the tube 0and'the ratchet-nut F rotated backward, the screw E being held againstrotation by the frictional pressure of its platen 6 against the massundergoing compression. The ratchet-nut being swiveled to the tube actsas a rotating wedge between the lower margin of the tube as an abutmentand the threads of the screw E, covered by the nut. The screw is thusdrawn downward as far as may be necessary. When the screw has reachedthe proper limit of protrusion, the tube is raised up and the screw isrotated by hand into the tube to its first position, while the nut isheld stationary and the parts then dropped down for a renewal of theoperation. Thus the tube is utilized as a shifting abutment to anydesired degree, and a relatively short, screw is made to do the work ofa long screw. These adjustments, as will be obvious, are easilyandquickly made and the capacity and efficiency of the apparatus therebylargely increased.

Instead of two plates a 0. as here shown, a single socket-piece may beused by casting the lower plate with a curb or hollow projection at theback and extending upward as a tubular guide for the tube 0. Variousother changes may be made in mechanical details without departing fromthe spirit'of my in vention, the essential feature of which is thelongitudinally adjustable tube telescoped about the screw andconstituting a shifting abutment for the operation of the screw. Forexample, the nut F might be rigidly attached to the tube and therotating power be applied to the screw or to the tube.

I claim as my invention and desire to secure by Letters Patent of theUnited States- 1. A screw-press of the character indicated embodying incombination a non -rotating tubular casing adjustably supported in thehead-block; a screw movable and guided longitudinally in the casing; anda nut seated on and engaging the threads of the screw and supporting thesame by swiveling connection with and upon the casing and operating thescrew without rotation of the latter, as a rotating wedge between thecasing and the screw- .threads, substantially as set forth.

2. A screw-press, embodying in combination a non-rotating tubular casingadj ustably supported in the head-block, means for holding the casing inadjusted positions, a screw movable and guided longitudinally in theeasing; a nut seated on the threads of the screw and supporting the sameby a swiveling connection with and upon the casing, and operating thescrew without rotating the latter by rotation as a rotating wedgebetween the screw and casing, and means for rotating said nut in eitherdirection by step-by-step movements, substantially as set forth.

3. The improved screw-press embodying, in combiuation,a non-rotatingtubular casing adjustable longitudinally in the head-block and devoid ofinternal threads; means for holding the casing in adjusted positions; anormally non-rotating screw guided telescopically within and protrudingbelow the casing; a threaded nut upon and engaging the screw, said nuthaving a swiveling connection with the tubular casing whereby it is heldbelow in rotative contact with the same; and means for rotating said nutin such contact and upon the threads of the screw; substantially as setforth.

4. In an extensible screw device of the character indicated, thecombination of a tubular casing adjustable in the head-block andcarrying telescopically a protruding normally non-rotating screw, and anadjustable clamp supported from the head-block and embracing the casingas a collar beneath and in contact with the head-block, substantially asset forth.

5. In a screw -press of the character indicated, the combination of atubular casing adjustably seated in and projecting below the head-block,a normally non-rotating screw guided telescopically in and protrudingbelow the tubular casing, a screw-nut abutting endwise against thecasing and engaging the threads of the screw below and supporting itmyhand in presence of two subsorib 1 rotatively upon the tubular casing,and anosnesses. f cillating pawl-frame swiveled upon and inpawl-engaging relations with the nut as a ro- LEWIS M 5 tating wedgeinterposed between the screw 'Witnesses: and easing, substantially asset forth. V LLOYD TJBRUNSON,

In testimony whereof I have hereunto set CHAS. HERBERT JONES.

